But I did not know of his condition.

Kourin knows of her condition and promises to help her out.

Clay bit Elena because he never thought they would be able to live together if she knew of his condition.

They knew of her condition or suspected it.

How much did Tad actually know or suspect of his condition?

At that time, very few people know of her bad physical condition.

Only in recent years, people came to know of her bad physical condition.

The Strangers are dead without always knowing of their true condition.

She does not know of my condition, of course.

If they knew of my condition, they would restrain me.